feature(dashboard): hide recent_files section title when the list is empty

[benelan]

Did you check the docs?

• [X] I have read all the snacks.nvim docs

Is your feature request related to a problem? Please describe.

I have the following section in my dashboard config:

{
  title = "Recent Files",
  section = "recent_files",
  cwd = true,
  indent = 2,
},

When I'm in a new project and there are no recent files for the cwd, it would be nice if the title was hidden.

Describe the solution you'd like

Hide the recent_files section's title if the length of the recent files list is 0. I think it makes sense as the default, but it could also be a boolean option.

Describe alternatives you've considered

N/A

Additional context

No response

[folke]

Makes sense. Added!